Best way to implement a help button?

I wanted to put a "Help button" in my program where the user needs to know what to do. My first try was to add a structure of the event, but that seemed to make the program which I don't really want to hang on. The sequence of flat is because I don't know how else to wait for the user to create a new spreadsheet file. I feel like there must be a more pleasant way to do so with three while loops and local variables, but I'm not sure how... Thanks for any help, the picture is attached.

You already got some good advice, so let's quickly look at your code of origin for the problem areas:

  • Because you use a popup that blocks the local while loop, even though it is visible, it must be in a separate loop. So that's good. Yet, instead of constantly running this loop, a structure of the event is preferable. Because you can also capture the stop event, you can eliminate the local variable and return the stop knob to lock the action as it should.
  • You have probably forgotten to uncheck ' front lock panel until the end of the event ", so the Panel before on appellant VI remain unmoved until the popup is closed. Personally, I make one using dialogue simple Subvi and use an event to toggle the visibility of the façade of the Help window instead. Given that it does not block, it can potentially be done in the main loop.
  • Data flow for long periods of time in a file, you must use a file IO. You create a lot of overhead, opening and closing the file on each iteration. Open a reference file, write the header before the loop, keep adding inside the loop and close the file we ended the loop.
  • According to the sampling intervals are how long, you should do the writing of the file in the case of an event structure time-out and add a case of stop. This makes it easy to immediately stop the VI, although the expectation is set in minutes or hours. If other events are allowed, you must make sure that the time-out is adjusted accordingly to maintain an equal pace. (See for example this old example posted here)
  • Get rid of the structure of sequence and this silly loop on the left. Keep the time-out period in an initialized to-1 shift register (= infinity) and add a startup event where you set the time-out to the desired value.
  • Soon, you have a nice state machine...

Tags: NI Software

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